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Multichannel cochlear implants in partially ossified cochleas.

T Balkany¹, B Gantz, J B Nadol

¹Colorado Otologic Research Center, Denver, CO 80210.

The Annals of Otology, Rhinology & Laryngology. Supplement

|September 1, 1988

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Cochlear implant surgery is feasible in patients with cochlear ossification. Multichannel electrode insertion in partially ossified cochleas yields results comparable to non-ossified cases, enabling hearing restoration.

Area of Science:

Otolaryngology
Neurosurgery
Biomedical Engineering

Background:

Cochlear ossification is common in cochlear implant candidates.
Previously considered a contraindication for multichannel electrodes due to insertion difficulties and uncertain outcomes.

Purpose of the Study:

To evaluate the feasibility and outcomes of multichannel intracochlear electrode insertion in patients with partial cochlear ossification.

Main Methods:

Fifteen profoundly deaf patients with partial cochlear ossification received long intracochlear electrodes.
Preoperative computed tomographic scans predicted ossification in 11 cases.
Electrode insertion was successful in 14 patients.

Main Results:

Related Experiment Videos

All patients are currently using their cochlear implant devices.

Nine of 12 postlingually deaf patients achieved open-set speech discrimination.

Outcomes were similar to those in patients with non-ossified cochleas.

Conclusions:

Multichannel electrode insertion into partially ossified cochleas is achievable in experienced hands.
Cochlear ossification should not be considered an absolute contraindication for cochlear implantation.
Similar hearing outcomes can be expected in patients with and without cochlear ossification.